issrg.pba.rbac
Class AdjustedValidityPeriod

java.lang.Object
  issrg.pba.rbac.SubsetCredentials
      issrg.pba.rbac.DefaultValidityPeriodBehaviour
          issrg.pba.rbac.RelativeValidityPeriod
              issrg.pba.rbac.AdjustedValidityPeriod

All Implemented Interfaces:

Credentials, ValidityPeriod, java.lang.Cloneable

Direct Known Subclasses:

AdjustedPeriodCollection

public class AdjustedValidityPeriod
extends RelativeValidityPeriod

This class represents a validity period with run-time rules. It builds the margins updated according to the rules and the given ValidityPeriod.

If the given validity period has NotAfter time between MinSpan and MaxSpan, and NotBefore time later than Age, then the unchanged validity period is returned. Otherwise an Invalid Period is returned (null length).

If no validity period is provided, it returns "now" for both notBefore and notAfter times.

Author:

A.Otenko

Field Summary

protected RelativeDate	age
protected RelativeDate	maxSpan
protected RelativeDate	minSpan

Fields inherited from class issrg.pba.rbac.RelativeValidityPeriod

na, nb, notAfter, theClock, unlimited

Constructor Summary

protected	AdjustedValidityPeriod()
	AdjustedValidityPeriod(RelativeDate age, RelativeDate minSpan, RelativeDate maxSpan) This constructor builds a AdjustedValidityPeriod given the Age, Min life span, and Max life span.

Method Summary

ValidityPeriod	adjust(ValidityPeriod vp) This method returns the given ValidityPeriod adjusted according to the constraints provided at construction time.
Credentials	intersection(Credentials c) This method redefines how intersection rule works.
java.lang.String	toString()

Methods inherited from class issrg.pba.rbac.RelativeValidityPeriod

clone, getNotAfter, getNotBefore

Methods inherited from class issrg.pba.rbac.DefaultValidityPeriodBehaviour

contains

Methods inherited from class issrg.pba.rbac.SubsetCredentials

equals, union

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface issrg.pba.Credentials

union

Field Detail

maxSpan

protected RelativeDate maxSpan

minSpan

protected RelativeDate minSpan

age

protected RelativeDate age

Constructor Detail

AdjustedValidityPeriod

protected AdjustedValidityPeriod()

AdjustedValidityPeriod

public AdjustedValidityPeriod(RelativeDate age,
                              RelativeDate minSpan,
                              RelativeDate maxSpan)

This constructor builds a AdjustedValidityPeriod given the Age, Min life span, and Max life span. Note that if Min life span is longer than Max life span, any ValidityPeriod will be invalid. Any or all of these parameters can be null, meaning that the ValidityPeriods will not be constrained in that respect.

Parameters:

age - - the maximum age of the ValidityPeriod; a RelativeDate showing the earliest point in the past when the ValidityPeriod can start; if it starts earlier, it is fully invalid

minSpan - - the minimum life span required of the ValidityPeriod; a RelativeDate showing the earliest point in the future when the ValidityPeriod can end; if it ends earlier, it is fully invalid

maxSpan - - the maximum life span required of the ValidityPeriod; a RelativeDate showing the latest point in the future when the ValidityPeriod can end; if it ends later, it is fully invalid

Method Detail

adjust

public ValidityPeriod adjust(ValidityPeriod vp)

This method returns the given ValidityPeriod adjusted according to the constraints provided at construction time. See description of the logic of the constraints in the constructor.

Parameters:

vp - - the ValidityPeriod to be constrained

intersection

public Credentials intersection(Credentials c)

This method redefines how intersection rule works. Effectively, it applies the adjust method to compute intersections, if the given Credentials is a ValidityPeriod.

Specified by:

intersection in interface Credentials

Overrides:

intersection in class DefaultValidityPeriodBehaviour

Parameters:

c - - a Credentials to intersect with; makes sense only if it is a ValidityPeriod, but supports intersections with other Credentials

Returns:

the ValidityPeriod that is the intersection of this and the given ValidityPeriod

toString

public java.lang.String toString()

Overrides:

toString in class RelativeValidityPeriod